PA VB130 pressure regulating unloader valve with choice of two types of springs for separate set up. At gun shut off, the water flow is bypassed at reduced pressure. Sturdy steel. Adjustable locknut to control the max pressure. Possibility to fit a venturi injector, on delivery, for chemicals. Plastic knob, upon request. 160 Bar rated pressure. 25 Lpm max flow. 90°C rated water temperature. Trapped pressure valve. Brass & steel construction. White spring.. 3/8"BSPM inlet. 3/8"BSPM outlet. 3/8"BSPF bypass.